Anti-aging or skin-regenerating composition comprising piperonylic acid as effective ingredient

ABSTRACT

The present invention relates to a pharmaceutical composition comprising piperonylic acid as an effective ingredient for anti-aging or regenerating the skin. A composition according to the present invention utilizes piperonylic acid that various plant species naturally contain therein and thus does not cause side effects. Piperonylic acid activates signals associated with cell survival, growth, and proliferation to exhibit the effect of increasing the resistance and survival of skin cells against external stimuli and enhancing the regeneration of the skin damaged due to external stimuli or senescence. In addition, piperonylic acid of the present invention has a similar function to EGF, but is stable and small in size in contrast to EGF. Thus, piperonylic acid of the present invention has the advantage of being able to easily move to the skin basal layer across the skin barrier and perform its function. Piperonylic acid of the present invention is expected to find applications in various fields including medicines, quasi-drugs, cosmetics, cosmetic substances, functional biomaterials, and functional food materials.

TECHNICAL FIELD

The present invention relates to a pharmaceutical composition comprising piperonylic acid as an effective ingredient for anti-aging or regenerating the skin.

BACKGROUND ART

Cell senescence is a physiological phenomenon that all living organisms cannot evade. Among them, skin senescence is very important for those who crave beauty. Due to skin senescence, the skin loses elasticity and becomes wrinkled, and senescence symptoms such as pigmentation and dermal atrophy appear. The skin senescence is largely divided into two types: physiological senescence, which exhibits changes in skin function, structure and shape, and senescence due to an external environment such as ultraviolet rays.

In addition to the deterioration in cell function with aging, the skin is affected by skin damage due to the external environment such as ultraviolet rays as follows. First, the division rate of keratinocytes divided in the epidermal basal layer slows down. The normal skin turnover period is about 28 days, but as senescence progresses, this cycle lengthens. Second, the number of fibroblasts in the dermis layer is reduced and the function thereof deteriorates. Fibroblasts are known to mainly produce collagen and elastin fibers that impart elasticity to the skin. However, when the number of fibroblasts in the dermis layer is reduced and the function thereof deteriorates, the biosynthesis of collagen and elastin fibers is reduced, and thus the atrophy of the dermis layer occurs. Third, the expression of matrix metalloproteinases is increased. Matrix metalloproteinases are enzymes that break down collagen and elastin fibers. While their expression increases with age, the atrophy of the dermis layer is further accelerated. In addition to this, skin senescence progresses in a very complex manner, while being affected by changes in immune responses, and the like.

As people's life expectancy increases and living standards rise, demand for substances that may nurture beauty increases while demands for well-being and beauty increase. As there is the saying that the most beautiful thing is youth, there is a need for developing an innovative substance that maintains the appearance of a youthful face by preventing and alleviating skin senescence.

Epidermal growth factor (EGF) is known as a growth factor that regulates the growth and survival of epidermal and epithelial cells. The discovery of EGF was an epoch-making event and was also selected for the Nobel Prize in Physiology or Medicine in 1986. EGF has been used medically to treat wounds of ulcers or burns that are difficult to heal depending on the function thereof, and recently has been widely used as a raw material of cosmetics for skin regeneration. However, EGF requires a lot of cost and labor for biosynthesis or separation and purification, and it is not easy to keep EGF in active state. Further, since EGF belongs to a relatively large polymer, there is a problem in that it is not easy for EGF to pass through the skin barrier that form a protective film having overlapped layers of keratin and keratinocytes nor to move to the skin basal layer.

Therefore, in the present invention, there is a need for research and development of a naturally-derived small molecular substance which has a similar function to EGF, is stable and small in size, and thus can easily pass through the skin barrier.

DISCLOSURE Technical Problem

The present inventors experimentally confirmed that a naturally-derived small molecular substance, piperonylic acid, has a similar function to epidermal growth factor (EGF), is stable and small in size, and thus can easily pass through the skin barrier, thereby completing the present invention.

Thus, an object of the present invention is to provide a pharmaceutical composition, a health functional food composition, and a cosmetic composition comprising piperonylic acid as an effective ingredient for anti-aging (delaying senescence) or regenerating the skin.

However, a technical problem to be achieved by the present invention is not limited to the aforementioned problem, and other problems that are not mentioned may be clearly understood by a person with ordinary skill in the art to which the present invention pertains from the following description.

Technical Solution

To achieve the object, the present invention provides a pharmaceutical composition, a health functional food composition, and a cosmetic composition comprising piperonylic acid as an effective ingredient for anti-aging or regenerating the skin.

As an embodiment of the present invention, the composition may alleviate or treat burn wounds.

As another embodiment of the present invention, the composition may promote the proliferation or growth of cells by binding to an epidermal growth factor receptor (EGFR).

As still another embodiment of the present invention, the cells may be keratinocytes.

As yet another embodiment of the present invention, the composition may enhance resistance to cell damage due to external stimuli.

As yet another embodiment of the present invention, the external stimuli may be ultraviolet rays.

As yet another embodiment of the present invention, the composition may enhance skin elasticity.

As yet another embodiment of the present invention, the composition may alleviate skin wrinkles.

Further, the present invention provides a method for anti-aging or regenerating the skin, the method comprising administering piperonylic acid to an individual.

In addition, the present invention provides a use of piperonylic acid for producing a medicine used to delay skin senescence and regenerate the skin.

Furthermore, the present invention provides a method for alleviating or treating skin wounds, the method comprising administering piperonylic acid to an individual.

Further, the present invention provides a use of piperonylic acid for producing a medicine used to alleviate or treat skin wounds.

As an embodiment of the present invention, the skin wounds may be burns.

Advantageous Effects

Piperonylic acid can be extracted from various plant species, and a composition according to the present invention has the advantage of having no side effect using the same.

Further, piperonylic acid of the present invention activates signals associated with cell survival, growth, and proliferation to exhibit the effect of increasing the resistance and survival of skin cells against external stimuli and enhancing the regeneration of the skin damaged due to external stimuli or senescence by binding to EFGR like EGF.

In addition, piperonylic acid of the present invention has a similar function to EGF, but is stable and small in size in contrast to EGF. Thus, piperonylic acid of the present invention has the advantage of being able to easily move to the skin basal layer through the skin barrier and perform its function.

Therefore, piperonylic acid of the present invention can be used in applications in various fields including medicines, quasi-drugs, cosmetics, cosmetic applications (including perfume), functional biomaterials, and functional food materials.

DESCRIPTION OF DRAWINGS

FIG. 1A is a view confirming the expression of a biosensor protein (EGFP-SH2) by intracellular injection of the EGFR activity measuring biosensor system.

FIG. 1B is a view confirming that the biosensor system is activated by EGF.

FIG. 1C is a view confirming that the biosensor system has EGF selectivity.

FIG. 2 is a view confirming that the biosensor system is activated by piperonylic acid.

FIG. 3A is a view confirming that EGFR binds to a piperonylic acid conjugated Sepharose 4B bead.

FIG. 3B is a view illustrating the top 10 EGFR binding sites of piperonylic acid predicted by the PatchDock program.

FIG. 3C illustrates the highest scoring binding site (blue) of piperonylic acid binding to EGFR. Purple indicates the binding site of EGF.

FIG. 4 is a view confirming that tyrosine phosphorylation of EGFR is increased by piperonylic acid. The tyrosine phosphorylation of EGFR means that EGFR is activated.

FIG. 5 is a view confirming the cytotoxicity of piperonylic acid at different concentrations on HaCaT cells, which are keratinocytes.

FIG. 6A confirms that ERK and AKT, downstream proteins of EGFR, are activated by piperonylic acid.

FIG. 6B confirms the pattern of changes in ERK and AKT activities by piperonylic acid over time.

FIG. 6C confirms that ERK and AKT activities due to piperonylic acid depends on EGFR activation.

FIG. 7A confirms the pattern of gene expression that changes over time after treatment with piperonylic acid.

FIG. 7B confirms that the expression of c-fos and egr-1 increased by piperonylic acid depends on EGFR activation.

FIG. 8A confirms the growth promotion efficacy of keratinocytes by piperonylic acid through CCK-8 assay.

FIGS. 8B and 8C confirm the proliferation and growth promotion efficacy of keratinocytes by piperonylic acid through a wound healing assay.

FIG. 9 illustrates that the resistance of keratinocytes is increased by piperonylic acid under conditions of cell damage due to UVB.

BEST MODES OF THE INVENTION

Since the present invention may be modified into various forms and include various exemplary embodiments, specific exemplary embodiments will be illustrated in the drawings and described in detail in the Detailed Description. However, the description is not intended to limit the present invention to the specific exemplary embodiments, and it is to be understood that all the changes, equivalents, and substitutions belonging to the spirit and technical scope of the present invention are included in the present invention. When it is determined that the detailed description of the related publicly known art in describing the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The present inventors experimentally confirmed that a naturally-derived small molecular substance, piperonylic acid, has a similar function to an epidermal growth factor (EGF), is stable and small in size, and thus can easily pass through the skin barrier, thereby completing the present invention.

Accordingly, the present invention provides a pharmaceutical composition comprising piperonylic acid as an effective ingredient for anti-aging or regenerating the skin. In the present invention, piperonylic acid may be represented by the following Chemical Formula 1, and the pharmaceutical composition may include piperonylic acid or a pharmaceutically acceptable salt thereof as an effective ingredient.

The piperonylic acid may be obtained from an extract of various plant species, and may increase the resistance and survival of skin cells against external stimuli and enhance the regeneration of the skin damaged due to external stimuli or senescence by performing a similar function to epidermal growth factor (EGF) which activates signals associated with cell survival, growth, and proliferation in the cells.

In the present specification, anti-aging means prevention or suppression of skin senescence. The skin senescence includes endogenous senescence due to the passage of time and exogenous senescence due to the external environment. The skin senescence may include skin wrinkles, blemishes, freckles, and the like. The skin wrinkles may be fine wrinkles resulting from the deterioration of the skin, and the skin wrinkles may be caused by photoaging, age, facial expression, lack of moisture, or a combination thereof. The photoaging may be skin senescence caused by exposure to ultraviolet rays (including UVA, UVB, and UVC). The alleviation of skin wrinkles may suppress or inhibit wrinkles from being produced in the skin, or may relieve wrinkles that have been already produced.

In the present specification, skin regeneration may be to prevent damage of cells from external and/or internal stimuli, alleviate wrinkles of the skin, and enhance elasticity of the skin, and includes the meaning of preventing, alleviating, or treating skin damage caused by the external environment.

In the present specification, skin damage is meant to include skin wounds such as damage or injuries occurring in the skin. The skin wounds may be selected from the group consisting of abrasions, bruises, lacerations, cut wounds, contusions, stab wounds, bed sores, burns, frostbite, skin ulcers and chemical wounds, and may be preferably burns.

Specifically, in an example of the present invention, a biosensor system was manufactured to measure the epidermal growth factor receptor (EGFR) on the cell membrane was internalized by endocytosis when the EGFR was activated. Then, it was confirmed that piperonylic acid of the present invention activated the EGFR (see Examples 1 and 2).

Therefore, according to an aspect of the present invention, the composition may bind to EGFR to promote the proliferation or growth of cells, thereby anti-aging or activating the regeneration of the skin. Cells that are proliferated or grown by the composition of the present invention may be epidermal cells, and may preferably be keratinocytes which are keratin-producing cells, but are not limited thereto.

Keratin is a protein that is a major constituent in various tissues of animals, and makes hair glossy and elastic, and imparts vitality and elasticity to the skin. Further, the keratin proteins in the keratin layer of the skin have strong resistance to chemicals, and thus may perform protective functions against chemical irritation on the skin.

In addition, as an aspect of the present invention, the present invention provides a composition comprising piperonylic acid or a pharmaceutically acceptable salt thereof for alleviating or treating burn wounds.

Specifically, in an example of the present invention, it was confirmed that piperonylic acid had cell proliferation and growth promotion efficacy through a wound healing assay which is a method for measuring the proliferation and growth of cells by culturing cells fully on a well plate, scratching a predetermined area of cells to form a wound area, and then observing the degree to which the area was filled again (see Example 8).

Therefore, according to an aspect of the present invention, the composition may delay senescence or activate the regeneration of the skin by enhancing resistance to cell damage due to external stimuli, and the external stimuli may be chemical stimuli due to cosmetics or other external preparations, physical stimuli, or ultraviolet rays, and may be preferably ultraviolet rays, but are not limited thereto.

Specifically, in an example of the present invention, in order to confirm effects of piperonylic acid of the present invention on enhancing resistance to cell damage due to ultraviolet rays (UVB), cell viability was confirmed by irradiating keratinocytes which had been treated with piperonylic acid with UVB. As a result, it was confirmed that piperonylic acid improved cell viability at a statistically significant value (see Example 9).

The pharmaceutical composition of the present invention may further include an appropriate carrier, an appropriate excipient, and an appropriate diluent, which are typically used to prepare a pharmaceutical composition. Further, the composition of the present invention may be used by being formulated in the form of an oral formulation such as a powder, a granule, a pill, a capsule, a suspension, an emulsion, a syrup, and an aerosol, an external preparation, a suppository, and a sterile injection solution, according to a typical method.

The pharmaceutical composition including piperonylic acid or a pharmaceutically acceptable salt thereof may be used by being formulated in the form of an external preparation such as a powder, a granule, a pill, a capsule, a suspension, an emulsion, a syrup, and an aerosol, and a sterile injection solution according to a typical method, and preferably may have a formulation of a cream, a gel, a patch, a spray, an ointment, a plaster, a lotion, a liniment, a paste, or a cataplasma. Examples of a carrier, an excipient or a diluent which may be included in the composition including piperonylic acid include lactose, dextrose, sucrose, an oligosaccharide, sorbitol, mannitol, xylitol, erythritol, maltitol, starch, acacia rubber, alginate, gelatin, calcium phosphate, calcium silicate, cellulose, methyl cellulose, microcrystalline cellulose, polyvinyl pyrrolidone, water, methyl hydroxybenzoate, propyl hydroxybenzoate, talc, magnesium stearate, and mineral oil. When the composition is prepared, the composition is prepared by using a diluent or excipient, such as a filler, an extender, a binder, a wetting agent, a disintegrant, and a surfactant, commonly used. A solid formulation for oral administration includes a tablet, a pill, a powder, a granule, a capsule, and the like, and the solid formulation is prepared by mixing at least one excipient, for example, starch, calcium carbonate, sucrose or lactose, gelatin, and the like with the extract. Further, in addition to a simple excipient, lubricants such as magnesium stearate and talc are also used. A liquid formulation for oral administration corresponds to a suspension, a liquid for internal use, an emulsion, a syrup, and the like, and the liquid formulation may include, in addition to water and liquid paraffin which are simple commonly used diluents, various excipients, for example, a wetting agent, a sweetener, an aromatic, a preservative, and the like. Examples of a formulation for parenteral administration include an aqueous sterile solution, a non-aqueous solvent, a suspension, an emulsion, a freeze-dried preparation, and a suppository. As the non-aqueous solvent and the suspension, it is possible to use propylene glycol, polyethylene glycol, a vegetable oil such as olive oil, an injectable ester such as ethyl oleate, and the like. As a base of the suppository, it is possible to use Witepsol, Macrogol, Tween 61, cacao butter, laurin fat, glycerogelatin, and the like.

The pharmaceutical composition according to the present invention is administered in a pharmaceutically effective amount. In the present invention, “pharmaceutically effective amount” means an amount sufficient to treat diseases at a reasonable benefit/risk ratio applicable to medical treatment, and an effective dosage level may be determined according to factors including type of disease of patients, the severity of disease, the activity of drugs, sensitivity to drugs, administration time, administration route, excretion rate, treatment period, and simultaneously used drugs, and other factors well known in the medical field. The pharmaceutical composition according to the present invention may be administered as an individual therapeutic agent or in combination with other therapeutic agents, may be administered sequentially or simultaneously with therapeutic agents in the related art, and may be administered in a single dose or multiple doses. It is important to administer the composition in a minimum amount that can obtain the maximum effect without any side effects, in consideration of all the aforementioned factors, and this amount may be easily determined by a person with ordinary skill in the art to which the present invention pertains.

The pharmaceutical composition of the present invention may be administered to an individual via various routes. All modes of administration may be expected, and the pharmaceutical composition of the present invention may be administered, for example, by subcutaneous, intravenous, intramuscular, intra-uterine dural, or intracerebral injection. The pharmaceutical composition of the present invention is determined by the type of drug that is an active ingredient, as well as various related factors such as the disease to be treated, the route of administration, the age, sex, and body weight of a patient, and the severity of the disease.

As another aspect of the present invention, the present invention provides a method for anti-aging or regenerating the skin, the method including administering a pharmaceutically effective amount of the pharmaceutical composition to an individual.

As still another aspect of the present invention, the present invention provides a method for alleviating or treating burn wounds, the method including administering a pharmaceutically effective amount of the pharmaceutical composition to an individual.

As used herein, the “individual” refers to a subject in need of treatment of a disease, and more specifically, refers to a mammal such as a human or a non-human primate, a mouse, a rat, a dog, a cat, a horse, and a cow.

Further, the present invention provides a use of a composition comprising piperonylic acid or a pharmaceutically acceptable salt thereof as an effective ingredient for anti-aging or regenerating the skin.

As yet another aspect of the present invention, the present invention provides a health functional food composition comprising piperonylic acid as an effective ingredient for anti-aging or regenerating the skin. Further, piperonylic acid may be added to food for the purpose of skin regeneration, such as delaying senescence, enhancing skin elasticity or alleviating skin wrinkles. When piperonylic acid of the present invention is used as a food additive, the piperonylic acid may be added as it is or used with another food or other food ingredients, and may be appropriately used according to a typical method. The amount of effective ingredient mixed may be suitably determined according to the purpose of use (prevention, health or therapeutic treatment). In general, when a food or beverage is prepared, piperonylic acid of the present invention is added in an amount of 15 wt % or less, preferably 10 wt % or less based on the raw materials. However, in the case of long-term intake for the purpose of health and hygiene, or for the purpose of controlling health, the amount may be equal to or less than the above range, and the effective ingredient may be used in an amount equal to or more than the above range due to no problem in terms of safety.

The type of food is not particularly limited. Examples of food to which the material may be added include meats, sausage, bread, chocolate, candies, snacks, confectioneries, pizza, instant noodles, other noodles, gums, dairy products including ice creams, various soups, beverages, tea, drinks, alcoholic beverages, vitamin complexes, and the like, and include all health functional foods in a typical sense.

The health beverage composition according to the present invention may contain various flavors or natural carbohydrates, and the like as additional ingredients as in a typical beverage. The above-described natural carbohydrates may be monosaccharides such as glucose and fructose, disaccharides such as maltose and sucrose, polysaccharides such as dextrin and cyclodextrin, and sugar alcohols such as xylitol, sorbitol, and erythritol. As a sweetener, it is possible to use a natural sweetener such as thaumatin and stevia extract, a synthetic sweetener such as saccharin and aspartame, and the like. The proportion of the natural carbohydrates is generally about 0.01 to 0.20 g, and preferably about 0.04 to 0.10 g per 100 ml of the composition of the present invention.

In addition to the aforementioned ingredients, the composition of the present invention may contain various nutrients, vitamins, electrolytes, flavors, colorants, pectic acid and salts thereof, alginic acid and salts thereof, organic acids, protective colloid thickeners, pH adjusters, stabilizers, preservatives, glycerin, alcohols, carbonating agents used in carbonated drinks, and the like. In addition, the composition of the present invention may contain flesh for preparing natural fruit juice, fruit juice drinks, and vegetable drinks. These ingredients may be used either alone or in combinations thereof. The proportion of these additives is not significantly important, but is generally selected within a range of 0.01 to 0.20 part by weight per 100 parts by weight of the composition of the present invention.

Furthermore, the piperonylic acid exhibits the effect of promoting the growth, proliferation, and survival of cells, and thus may be provided in the form of a cosmetic composition for the purpose of skin regeneration, such as anti-aging, enhancing skin elasticity or alleviating skin wrinkles. A formulation of the cosmetic composition according to the present invention may be in the form of a skin lotion, skin softener, skin toner, astringent, lotion, milk lotion, moisturizing lotion, nourishing lotion, massage cream, nourishing cream, moisturizing cream, hand cream, foundation, essence, nourishing essence, pack, soap, cleansing foam, cleansing lotion, cleansing cream, body lotion or body cleanser.

The cosmetic composition of the present invention may further include a composition selected from the group consisting of water-soluble vitamins, oil-soluble vitamins, polymer peptides, polymeric polysaccharides, and sphingolipids.

Any water-soluble vitamin may be used as long as it can be incorporated into cosmetics, but preferred examples thereof include vitamin B1, vitamin B2, vitamin B6, pyridoxine, pyridoxine hydrochloride, vitamin B12, pantothenic acid, nicotinic acid, nicotinamide, folic acid, vitamin C, vitamin H, and the like, and salts thereof (thiamine hydrochloride, sodium ascorbate, and the like) or derivatives thereof (ascorbic acid-2-phosphate sodium salt, ascorbic acid-2-phosphate magnesium salt, and the like) are also included in the water-soluble vitamins which may be used in the present invention. The water-soluble vitamin may be obtained by a typical method such as a microbial transformation method, purification from a culture of a microorganism, an enzymatic method or a chemical synthesis method.

Any oil-soluble vitamin may be used as long as it can be incorporated into cosmetics, but preferred examples thereof include vitamin A, carotene, vitamin D2, vitamin D3, vitamin E (dl-alpha tocopherol, d-alpha tocopherol, and d-alpha tocopherol), and the like, and derivatives thereof (ascorbic palmitate, ascorbic stearate, ascorbic acid dipalmitate, dl-alpha tocopherol acetate, dl-alpha tocopherol vitamin E acetate, DL-pantothenyl alcohol, D-pantothenyl alcohol, pantothenyl ethyl ether, and the like) and the like are also included in the oil-soluble vitamins which are used in the present invention. The oil-soluble vitamin may be obtained by a typical method such as a microbial transformation method, purification from a culture of a microorganism, an enzymatic method or a chemical synthesis method.

Any polymer peptide may be used as long as it can be incorporated into cosmetics, but preferred examples thereof include collagen, hydrolyzed collagen, gelatin, elastin, hydrolyzed elastin, keratin and the like. The polymer peptide may be purified and obtained by a typical method such as purification from a culture solution of a microorganism, an enzymatic method or a chemical synthesis method, or typically may be purified from natural products such as the dermis of pigs, cows, and the like and silk fibers of silkworms and used.

Any polymeric polysaccharide may be used as long as it can be incorporated into cosmetics, but preferred examples thereof include hydroxyethyl cellulose, xanthan gum, sodium hyaluronate, chondroitin sulfate, salts thereof (sodium salts, and the like), or the like. For example, chondroitin sulfate, salts thereof, or the like may be typically purified from mammals or fish and used.

Any sphingolipid may be used as long as it can be incorporated into cosmetics, but preferred examples thereof include ceramide, phytosphingosine, glycosphingolipid and the like. The sphingolipids may be typically purified from mammals, fish, shellfish, yeast, plants, or the like by a typical method, or may be obtained by a chemical synthesis method.

Other ingredients typically incorporated into cosmetics may also be blended with the cosmetic composition of the present invention, if necessary, together with the essential ingredients.

Examples of other blended ingredients which may be added include oil and fat ingredients, a moisturizer, an emolient, a surfactant, organic and inorganic pigments, an organic powder, an ultraviolet absorbent, a preservative, a bactericide, an antioxidant, a plant extract, a pH adjuster, an alcohol, a colorant, a fragrance, a circulation accelerator, a cooling agent, an antiperspirant, purified water, and the like.

Examples of the oil and fat ingredients include ester-based oils and fats, hydrocarbon-based oils and fats, silicone-based oils and fats, fluorine-based oils and fats, animal oils and fats, plant oils and fats, and the like.

Examples of the ester-based oils and fats include ester-based oils and fats such as glyceryl tri 2-ethylhexanoate, cetyl 2-ethylhexanoate, isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, octyl palmitate, isocetyl isostearate, butyl stearate, ethyl linoleate, isopropyl linoleate, ethyl oleate, isocetyl myristate, isostearyl myristate, isostearyl palmitate, octyldodecyl myristate, isocetyl isostearate, diethyl sebacate, diisopropyl adipate, isoalkyl neopentanoate, tri(capryl, capric acid)glyceryl, tri 2-ethylhexanoic acid trimethylol propane, triisostearic acid trimethyol propane, tetra 2-ethylhexanoic acid pentaerythritol, cetyl caprylate, decyl laurate, hexyl laurate, decyl myristate, myristyl myristate, cetyl myristate, stearyl stearate, decyl oleate, cetyl ricinoleate, isostearyl laurate, isotridecyl myristate, isocetyl palmitate, octyl stearate, isocetyl stearate, isodecyl oleate, octyldodecyl oleate, octyldodecyl linoleate, isopropyl isostearate, 2-ethylhexanoic acid cetostearyl, 2-ethylhexanoic acid stearyl, hexyl isostearate, ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, di(capryl, capric acid)propylene glycol, propylene glycol dicaprylate, neopentyl glycol dicaprate, neopentyl glycol dioctanoate, glyceryl tricaprylate, glyceryl triundecylate, glyceryl triisopalmitate, glyceryl triisostearate, octyldodecyl neopentanoate, isostearyl octanoate, octyl isononate, hexyldecyl neodecanoate, octyldodecyl neodecanoate, isocetyl isostearate, isostearyl isostearate, octyldecyl isostearate, polyglycerin ester oleate, polyglycerin ester isostearate, isocetyl citrate, triisoalkyl citrate, triisooctyl citrate, lauryl lactate, myristyl lactate, cetyl lactate, octyldecyl lactate, triethyl citrate, acetyltriethyl citrate, acetyltributyl citrate, trioctyl citrate, diisostearyl malate, 2-ethylhexyl hydroxystearate, di 2-ethylhexyl succinate, diisobutyl adipate, diisopropyl sebacate, dioctyl sebacate, cholesteryl stearate, cholesteryl isostearate, cholesteryl hydroxystearate, cholesteryl oleate, dihydrocholesteryl oleate, phytosteryl isostearate, phytosteryl oleate, isocetyl 12-stealoyl hydroxystearate, stearyl 12-stealoyl hydroxystearate, isostearyl 12-stealoyl hydroxystearate, or the like.

Examples of the hydrocarbon-based oils and fats include hydrocarbon-based oils and fats such as squalene, liquid paraffin, alpha-olefin oligomers, isoparaffin, sericin, paraffin, liquid isoparaffin, polybutene, microcrystalline wax, and Vaseline, or the like.

Examples of the silicone-based oils and fats include polymethyl silicone, methylphenyl silicone, methylcyclopolysiloxane, octamethyl polysiloxane, decamethyl polysiloxane, dodecamethyl cyclosiloxane, a dimethylsiloxane.methyl cetyloxysiloxane copolymer, a dimethylsiloxane.methyl stearoxysiloxane copolymer, alkyl-modified silicone oil, amino-modified silicone oil, and the like.

Examples of the fluorine-based oils and fats include perfluoropolyether, and the like.

Examples of the animal or plant oils and fats include animal or plant oils and fats such as avocado oil, almond oil, olive oil, sesame oil, rice bran oil, new flower oil, soybean oil, corn oil, rapeseed oil, apricot kernel oil, palm kernel oil, palm oil, castor oil, sunflower oil, grapeseed oil, cottonseed oil, palm oil, kukui nut oil, wheat germ oil, rice germ oil, shea butter, evening primrose oil, macadamia nut oil, meadow home oil, egg yolk oil, beef tallow, horse oil, mink oil, orange roughy oil, jojoba oil, candelilla wax, carnauba wax, liquid lanolin and hardened castor oil.

Examples of the moisturizer include a water-soluble low molecular moisturizer, a fat-soluble low molecular moisturizer, a water-soluble polymer, a fat-soluble polymer, and the like.

Examples of the water-soluble low molecular moisturizer include serine, glutamine, sorbitol, mannitol, pyrrolidone-sodium carboxylate, glycerin, propylene glycol, 1,3-butylene glycol, ethylene glycol, polyethylene glycol B (polymerization degree n=2 or more), polypropylene glycol (polymerization degree n=2 or more), polyglycerin B (polymerization degree n=2 or more), lactic acid, lactate, and the like.

Examples of the fat-soluble low molecular moisturizer include cholesterol, cholesterol ester, and the like.

Examples of the water-soluble polymer include a carboxyvinyl polymer, polyaspartate, tragacanth, xanthane gum, methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, water-soluble chitin, chitosan, dextrin, and the like.

Examples of the fat-soluble polymer include a polyvinylpyrrolidone.eicosene copolymer, a polyvinylpyrrolidone.hexadecene copolymer, nitrocellulose, dextrin fatty acid ester, high molecular silicone, and the like.

Examples of the emollient include long-chain acylglutamate cholesteryl ester, cholesteryl hydroxystearate, 12-hydroxystearic acid, stearic acid, rosin acid, lanolin fatty acid cholesteryl ester, and the like.

Examples of the surfactant include a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, and the like.

Examples of the nonionic surfactant include auto-emulsified glycerin monostearate, propylene glycol fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene (POE) sorbitan fatty acid ester, POE sorbitol fatty acid ester, POE glycerin fatty acid ester, POE alkyl ether, POE fatty acid ester, POE hardened castor oil, POE castor oil, a polyoxyethylene.polyoxypropylene (POE.POP) copolymer, POE.POP alkyl ether, polyether-denatured silicone, alkanolamide laurate, alkylamine oxide, hydrogenated soybean phospholipid, and the like.

Examples of the anionic surfactant include fatty acid soap, α-acylsulfonate, alkyl sulfonates, alkyl allyl sulfonates, alkyl naphthalene sulfonates, alkyl sulfates, POE alkyl ether sulfate, alkylamide sulfates, alkyl phosphates, POE alkyl phosphates, alkylamide phosphates, alkyloyl alkyl taurine salts, N-acylamino acid salts, POE alkyl ether carboxylates, alkylsulfosuccinates, sodium alkylsulfoacetates, acylated hydrolyzed collagen peptide salts, perfluoroalkyl ester phosphate, and the like.

Examples of the cationic surfactant include alkyltrimethylammonium chloride, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, cetostearyltrimethylammonium chloride, distearyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, behenyltrimethylammonium bromide, benzalkonium chloride, diethylaminoethylamide stearate, dimethylaminopropylamide stearate, lanolin derivative quaternary ammonium salts, and the like.

Examples of the amphoteric surfactant include amphoteric surfactants of the following types: carboxybetaines, amidebetaines, sulfobetaines, hydroxysulfobetaines, amidesulfobetaines, phosphobetaines, aminocarboxylates, imidazoline derivatives and amideamines.

Examples of the organic and inorganic pigments include inorganic pigments such as silicic acid, anhydrous silicic acid, magnesium silicate, talc, sericite, mica, kaolin, bengala, clay, bentonite, titanium-coated mica, bismuth oxychloride, zirconium oxide, magnesium oxide, zinc oxide, titanium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, iron oxide, ultramarine blue, chromium oxide, chromium hydroxide, carmine, and complexes thereof; organic pigments such as polyamide, polyester, polypropylene, polystyrene, polyurethane, vinyl resins, urea resins, phenol resins, fluororesins, silicone resins, acrylic resins, melamine resins, epoxy resins, polycarbonate resins, divinyl a benzene.styrene copolymer, silk powder, cellulose, CI pigment yellow and CI pigment orange; complex pigments of these inorganic pigments and organic pigments, and the like.

Examples of the organic powder include metal soaps such as calcium stearate; alkylphosphoric acid metal salts such as sodium zinc cetylphosphate, zinc laurylphosphate and calcium laurylphosphate; acylamino acid polyvalent metal salts such as N-lauroyl-β-alanine calcium, N-lauroyl-β-alanine zinc and N-lauroylglycine calcium; amidesulfonic acid polyvalent metal salts such as N-lauroyl-taurine calcium and N-palmitoyl-taurine calcium; N-acyl basic amino acids such as N-ε-lauroyl-L-lysine, N-ε-palmitoyllysine, N-α-palmitoylornithine, N-α-lauroylarginine and N-α-hardened beef tallow fatty acid acylarginine; N-acylpolypeptides such as N-lauroylglycylglycine; α-amino fatty acids such as α-aminocaprylic acid and α-aminolauric acid; polyethylene, polypropylene, nylon, polymethyl methacrylate, polystyrene, a divinyl benzene.styrene copolymer, ethylene tetrafluoride, and the like.

Examples of the ultraviolet absorbent include para-aminobenzoic acid, ethyl para-aminobenzoate, amyl para-aminobenzoate, octyl para-aminobenzoate, ethylene glycol salicylate, phenyl salicylate, octyl salicylate, benzyl salicylate, butylphenyl salicylate, homomenthyl salicylate, benzyl cinnamate, 2-ethoxyethyl para-methoxycinnamate, octyl para-methoxycinnamate, glyceryl mono(2-ethylhexanoate) dipara-methoxycinnamate, isopropyl para-methoxycinnamate, diisopropyl.diisopropylcinnamic acid ester mixtures, urocanic acid, ethyl urocanate, hydroxymethoxybenzophenone, hydroxymethoxybenzophenonesulfonic acid and salts thereof, dihydroxymethoxybenzophenone, sodium dihydroxymethoxybenzophenonedisulfonate, dihydroxybenzophenone, tetrahydroxybenzophenone, 4-tert-butyl-4′-methoxydibenzoylmethane, 2,4,6-trianilino-p-(carbo-2′-ethylhexyl-1′-oxy)-1,3,5-triazine, 2-(2-hydroxy-5-methylphenyl)benzotriazole, and the like.

Examples of the bactericide include hinokitiol, triclosan, trichlorohydroxydiphenyl ether, chlorhexidine gluconate, phenoxyethanol, resorcin, isopropylmethylphenol, azulene, salicylic acid, zinc pyrithione, benzalkonium chloride, photosensitizing dye No. 301, sodium mononitroguaiacol, undecylenic acid, and the like.

Examples of the antioxidant include butylhydroxyanisole, propyl gallate, erythorbic acid, and the like.

Examples of the pH adjuster include citric acid, sodium citrate, malic acid, sodium malate, fumaric acid, sodium fumarate, succinic acid, sodium succinate, sodium hydroxide, disodium hydrogen phosphate, and the like.

Examples of the alcohol include higher alcohols such as cetyl alcohol.

Further, the blended ingredients that may be added in addition to the aforementioned ingredients are not limited thereto, and any of the ingredients can be blended within a range that does not impair the purpose and effect of the present invention, but is blended at preferably 0.01 to 5 wt %, and more preferably 0.01 to 3 wt % based on the total weight.

When the formulation of the present invention is a lotion, a paste, a cream, or a gel, an animal fiber, a vegetable fiber, a wax, paraffin, starch, tragacanth, a cellulose derivative, polyethylene glycol, silicone, bentonite, silica, talc, zinc oxide, or the like may be used as the carrier ingredient.

When the formulation of the present invention is a powder or a spray, lactose, talc, silica, aluminum hydroxide, calcium silicate, or a polyamide powder may be used as the carrier ingredient, and in particular, when the formulation is a spray, the formulation may include a propellent such as chlorofluorohydrocarbon, propane/butane or dimethyl ether.

When the formulation of the present invention is a solution or an emulsion, a solvent, a solubilizer or an emulsifier is used as the carrier ingredient, and examples thereof include water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butylglycol oil, glycerol aliphatic esters, polyethylene glycol or fatty acid esters of sorbitan.

When the formulation of the present invention is a suspension, a liquid diluent such as water, ethanol or propylene glycol, a suspension such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar, tragacanth, or the like may be used as the carrier ingredient.

When the formulation of the present invention is a surfactant-containing cleanser, an aliphatic alcohol sulfate, an aliphatic alcohol ether sulfate, sulphosuccinic acid monoester, isethionate, an imidazolinium derivative, methyltaurate, sarcosinate, fatty acid amide ether sulfate, alkylamidobetain, an aliphatic alcohol, fatty acid glyceride, fatty acid diethanolamide, a vegetable oil, a lanolin derivative, an ethoxylated glycerol fatty acid ester, or the like may be used as the carrier ingredient.

MODES OF THE INVENTION

Since the present invention may be modified into various forms and include various exemplary embodiments, specific exemplary embodiments will be illustrated in the drawings and described in detail in the Detailed Description. However, the description is not intended to limit the present invention to the specific exemplary embodiments, and it is to be understood that all the changes, equivalents, and substitutions belonging to the spirit and technical scope of the present invention are included in the present invention. When it is determined that the detailed description of the related publicly known art in describing the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred Examples for helping the understanding of the present invention will be suggested. However, the following Examples are provided only to more easily understand the present invention, and the contents of the present invention are not limited by the following Examples.

EXAMPLES Example 1. Manufacture of a Biosensor System that Measures EGFR Activation

When EGFR is activated, phosphorylation occurs at the tyrosine residue of the cytoplasmic portion, and signals are transmitted while various proteins are connected to this portion. As a representative linker protein, there is Grb2, and the SH2 domain of Grb2 serves to bind to the phosphorylated tyrosine residue. When the EGFR activation continues to be maintained, EGFR follows a feedback mechanism in which it is internalized inside cells and degraded. Using these characteristics, a biosensor system was manufactured such that EGFR internalization by the EGFR activation could be measured by a fluorescent protein. Specifically, an EGFP-SH2 vector was manufactured by removing only the SH2 domain of Grb2 and inserted it in an enhanced green fluorescent protein (EGFP) vector using recombinant DNA technology, and then introduced it into A549 cells for expression.

As a result, as illustrated in FIG. 1A, it was confirmed that the manufactured EGFP-SH2 biosensor protein was expressed at the expected size.

Subsequently, it was confirmed whether the EGFR activation was measured by culturing cells in which EGFP was introduced into the biosensor system in a serum-free medium for 24 hours, and then treating the cells with EGF (100 ng/ml).

As a result, as illustrated in FIG. 1B, it was confirmed that only in the cells introduced with the biosensor, the densely packed biosensor was appeared as fluorescence signals in the form of small dots arounds the internalized EGFR when 30 minutes after EGF treatment.

In order to confirm whether such a phenomenon was induced by other growth factors, cells were treated with FGF1, FGF2, and FGF7 which are fibroblast growth factors (FGFs) in the same manner to detect a fluorescence signal.

As a result, as illustrated in FIG. 1C, it was confirmed that no biosensor signal was shown by other growth factors. As the EGF selectivity of the manufactured biosensor system was verified, a stable cell line in which the biosensor was stably expressed was selected.

Example 2. Piperonylic Acid Inducing EGFR Activation in Biosensor System

After the biosensor system cells manufactured in Example 1 were treated with 100 μM of piperonylic acid (purchased from Sigma-Aldrich), a change in fluorescence signal was observed. After being cultured in a serum-free medium for 24 hours, the cells were treated with piperonylic acid.

As a result, as illustrated in FIG. 2, it could be confirmed that compared to a control which was treated with only the solvent DMSO, EGFR was activated in the cells treated with 100 μM of piperonylic acid.

Example 3. Interaction of EGFR with Piperonylic Acid

In order to investigate the mechanism of EGFR activation by piperonylic acid confirmed in Example 2, it was confirmed in the present example whether piperonylic acid could interact with EGFR. For this purpose, piperonylic acid-4B bead was manufactured by conjugating piperonylic acid to a Cyanogen bromide-activated-Sepharose 4B bead purchased from Sigma-Aldrich. Equal amounts of HaCaT cell lysates were incubated with piperonylic acid-4B bead and control-4B used as the control, and proteins bound to the bead were analyzed by the Western blotting method. An anti-EGFR antibody was used in order to measure EGFR among the precipitated proteins, and anti-Actin and anti-GAPDH antibodies against actin and GAPDH proteins present in large amounts as housekeeping genes were used in order to support that the binding to piperonylic acid was selective.

As a result, as illustrated in FIG. 3A, it was confirmed that EGFR was bound to piperonylic acid-4B bead to which piperonylic acid was linked, and it was confirmed that when interaction with the bead was competed for by adding 100 μM of free piperonylic acid with the cell lysate, the amount of EGFR bound thereto was reduced.

In order to see where these interactions occur in EGFR, an in silico analysis was performed using the PatchDock program, which can predict the binding site.

As a result, as illustrated in FIGS. 3B and 3C, a prediction was made based on the three-dimensional structural database (1MOX) of the extracellular domain of EGFR, and as a result, many positions where piperonylic acid could bind were found. In addition, as a result of analyzing the position where the highest score could be bound among the top 10 predicted scoring positions, there was a slight difference from the position where EGF binds, but if the binding of piperonylic acid induces the three-dimensional structural deformation of EGFR even incompletely, it was expected that activation would occur.

Example 4. Activation of EGFR by Piperonylic Acid

In order to confirm whether the binding of piperonylic acid with EGFR directly induces the EGFR activation, HaCaT cells cultured in a serum-free medium were treated with piperonylic acid at a concentration of 100 μM for 10 minutes, and then the activation was measured through an increasing tyrosine phosphorylation of EGFR. Specifically, after only EGFR was precipitated from 500 μg of cell lysate by immunoprecipitation using anti-EGFR antibody and protein-G agarose beads, the level of tyrosine phosphorylation was analyzed by Western blotting method.

As a result, as illustrated in FIG. 4, the tyrosine phosphorylation by piperonylic acid was increased by 1.8 fold compared to that of the solvent DMSO which is a negative control.

Example 5. Measurement of Cytotoxicity of Piperonylic Acid by Concentration

The cytotoxicity of piperonylic acid was measured using HaCaT cells which are keratinocytes. When cells are treated with a yellow water-soluble substrate MTT tetrazolium, the substrate is reduced to MTT formazan by mitochondrial enzymes and the color changes to blue-violet. Since the more living cells there are, the darker the blue-violet color appears, the blue-violet absorbance at 540 nm reflects the concentration of living cells. Specifically, after cells were cultured fully in each well of a 96-well plate, cells were treated with piperonylic acid at a concentration of 0, 25, 50, 100, 250, and 500 μM and cultured at 37° C. in a 5% CO₂ incubator for 24 hours and 48 hours, and then the viability of cells was measured by an MTT reagent. A control (0 μM) that had not been treated with piperonylic acid was treated with an equal amount of solvent, DMSO.

As a result, as illustrated in FIG. 5, a statistically significant difference was shown under the condition of culturing cells at a concentration of 500 μM for 48 hours (#p<0.0001), but since the difference was as small as about 10%, it was confirmed that cytotoxicity to keratinocytes was very low. The significance of the experimental results was verified by performing a t-test on an experimental group and the control.

Example 6. ERK and AKT Activation by Piperonylic Acid

It is well known that the activation of extracellular signal-regulated kinase (ERK) and protein kinase B (AKT) are induced by the EGFR activation and transmit signals required for cell growth and survival. Accordingly, as the activation of EGFR by piperonylic acid was verified in Examples 2 and 3, it was determined whether ERK and AKT, the downstream of EGFR, were also activated by piperonylic acid. Specifically, after HaCaT cells were cultured in a serum-free medium, the cells were treated with piperonylic acid at 0, 25, and 100 μM, and then ERK and AKT, which were activated when phsphorylated, were analyzed by Western blotting method. As antibodies, phosphor-site specific antibodies which are labeling factors of activated ERK and AKT and antibodies that measure total ERK and AKT were used, and GAPDH expressed from a housekeeping gene was measured in order to correct the amount of total proteins between lanes.

As a result, as illustrated in FIG. 6A, it was confirmed that piperonylic acid at 100 μM treatment for 10 minutes sufficiently induced the activation of ERK and AKT. Through three repeated experiments, it was confirmed that piperonylic acid at 100 μM significantly activated ERK and AKT by 3.3 fold and 2.1 fold, respectively compared to the control (t-test, **p<0.01, *p<0.05).

Subsequently, in order to confirm the pattern of ERK and AKT activities by piperonylic acid treatment over time, HaCaT cells cultured in a serum-free medium were treated with piperonylic acid, and then the activity pattern over time was analyzed.

As a result, as illustrated in FIG. 6B, the activation of ERK and AKT was rapidly induced for 5 to 10 minutes, and was immediately down-regulated, and then activated again after 1 to 2 hours.

In order to verify that the activation of ERK and AKT by piperonylic acid were induced by EGFR, the activity of EGFR was suppressed by treating cells with tyrphostin AG1478 which is an EGFR antagonist, and then the activities of ERK and AKT by piperonylic acid were analyzed.

As a result, as illustrated in FIG. 6C, it was confirmed that when HaCaT cells cultured in a serum-free medium were first treated with AG1478 at 200 nM for 10 minutes, and treated with piperonylic acid, the ERK and AKT were not activated. This reflects that the activation of EGFR by piperonylic acid is required for the activation of ERK and AKT.

Example 7. Change in Gene Expression by Piperonylic Acid

Signaling by EGFR induces gene expression that is important for cell growth and survival via important signaling mediator proteins which are ERK and AKT. It is well known that c-myc, c-jun, c-fos, and egr-1 genes are genes which are regulated by EGFR and promote cell growth and survival. HaCaT cells cultured in a serum-free medium were treated with piperonylic acid at a concentration of 100 μM, which sufficiently induced the activities of ERK and AKT in Example 5, and the changes in expression of each gene were analyzed after 0, 1, 2, and 6 hours. Specifically, a Tri-reagent was used for mRNA extraction, cDNA was made by a reverse transcription polymerase chain reaction (RT-PCR) using a poly-A primer and a reverse transcriptase, and the amount of each mRNA was measured using real-time quantitative PCR. The amount of each mRNA was corrected with the amount of β-actin which is a housekeeping gene.

As a result, as illustrated in FIG. 7A, c-fos, egr-1, and c-myc exhibited a statistically significant difference at 2 and 6 hours (t-test, *p<0.05, **p<0.01), and c-jun also exhibited an increasing tendency. It was confirmed that the pattern of an increase in expression of the mRNA led to an increase in expression of Egr-1 and c-Fos proteins.

In order to verify that c-fos and egr-1 exhibiting the most remarkable increasing pattern at 2 hours after the treatment with piperonylic acid are affected when the activation of EGFR is suppressed by AG1478 which is an EGFR antagonist, the gene expressions of cells treated with AG1478 and then treated with piperonylic acid and cells treated with only piperonylic acid other than AG1478 were compared, and the expression of proteins were compared using Western blotting method.

As a result, as illustrated in FIG. 7B, it was confirmed that the gene expression of c-fos and egr-1 increased by piperonylic acid at 100 μM was completely suppressed by AG1478 (t-test, **p<0.01, ***p<0.001). Further, it was confirmed that the suppression the gene expression led to a change in protein expression.

Example 8. Promotion of Growth and Proliferation of Keratinocytes by Piperonylic Acid

Cell counting kit-8 (CCK-8) is a water-soluble tetrazolium salt reagent called WST-8, and forms orange water-soluble formazan by a dehydrogenase in the mitochondria of living cells. The absorbance of the orange wavelength at 450 nm as indicated by CCK-8 reflects the number of cells, and thus has been used to measure cell growth and proliferation. The growth promotion efficacy of keratinocytes, HaCaT cells, was measured by CCK-8 assay using non-cytotoxic piperonylic acid at a concentration of 50 μM and 100 μM. Specifically, after 1×10⁴ HaCaT cells were cultured on a 96-well plate for 24 hours, growth factors in the medium were removed by exchanging the medium with a serum-free medium, and then the cells were treated with piperonylic acid. An equal amount of the solvent DMSO was used as a negative control, and EGF at a concentration of 1 ng/ml was used as a positive control. After the cells were cultured for 24 hours, the cell growth was analyzed by treating the cells with CCK8 and measuring the absorbance at 450 nm.

As a result, as illustrated in FIG. 8A, it was confirmed that when cells were treated with piperonylic acid, cell growth and proliferation were significantly increased compared to the negative control (**p<0.01, ****p<0.0001).

Further, the cell growth promotion efficacy by piperonylic acid was confirmed through a wound healing assay. Specifically, after HaCaT cells were cultured fully on a 12-well plate, a wound area was formed using a yellow tip, and the cells were treated with piperonylic acid at 50 μM and 100 μM after exchanging the medium with a serum-free medium. The solvent DMSO was used as a negative control, and 1 ng/ml of EGF was used as a positive control.

As a result, as illustrated in FIGS. 8B and 8C, it could be confirmed that in the culturing for 3 days, when cells were treated with piperonylic acid, the wound area was more rapidly filled more than the negative control, and on the day 3, a significance was appeared compared to the negative control (Two-way ANOVA, **p<0.01, ****p<0.0001).

Example 9. Resistance Efficacy of Piperonylic Acid to Ultraviolet Ray (UVB) Stimulus

Among the ultraviolet wavelengths, the UVB wavelength corresponding to 280 to 315 nm penetrates the epidermal layer where many keratinocytes are present to cause cell damage. Cell damage caused by UVB may lead to cell apoptosis, and it was confirmed whether piperonylic acid promoted the growth and survival signaling of keratinocytes, and thus exhibited resistance to cell damage induced by UVB. Specifically, the 96-well plate on which 1×10⁴ cells were cultured was irradiated with UVB at 25 mJ/cm², and then the cells were cultured in a serum-free medium in which piperonylic acid or EGF was present. The solvent DMSO was used as a negative control, and cell viability was measured using the CCK-8 method used in Example 7.

As a result, as illustrated in FIG. 9, it was confirmed that in the negative control, cell apoptosis occurred due to UVB at 25 mJ/cm², and thus only 84% of cells survived, whereas 89% of cells survived due to piperonylic acid at 100 μM, exhibiting a statistically significant value (t-test, *p<0.05, ****p<0.0001).

From the results, it can be seen that piperonylic acid can reduce the skin regeneration cycle by promoting the growth and proliferation of keratinocytes, and can have the effect of regenerating the skin such as prevention of skin senescence, enhancement of skin elasticity, and alleviation of skin wrinkles by imparting resistance to stress in the external and/or internal environments.

Although a specific part of the present invention has been described in detail, it will be obvious to a person with ordinary skill in the art to which the present pertains that such a specific description is just a preferred embodiment and the scope of the present invention is not limited thereby. Accordingly, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

INDUSTRIAL APPLICABILITY

Piperonylic acid of the present invention is a natural material that can be obtained from the extract of various plant species, and performs a similar function to epidermal growth factor (EGF), and thus is expected to be used in applications in various fields including medicines, quasi-drugs, cosmetics, cosmetic substances, functional biomaterials, and functional food materials in order to prevent skin senescence and damage due to exogenous or endogenous factors or treat skin wounds. 

What is claimed is: 1-24. (canceled)
 25. A composition comprising piperonylic acid as an effective ingredient for anti-aging or regenerating the skin.
 26. The composition of claim 25, wherein the composition is a pharmaceutical composition, a health function food composition, or cosmetic composition.
 27. The composition of claim 25, wherein the composition alleviates or treats skin wounds.
 28. The composition of claim 25, wherein the composition promotes the proliferation or growth of cells by binding to an epidermal growth factor receptor (EGFR).
 29. The composition of claim 28, wherein the cells are keratinocytes.
 30. The composition of claim 25, wherein the composition enhances resistance to cell damage due to external stimuli.
 31. The composition of claim 30, wherein the external stimulus is ultraviolet rays.
 32. The composition of claim 25, wherein the composition enhances skin elasticity.
 33. The composition of claim 25, wherein the composition alleviates skin wrinkles.
 34. A method for anti-aging or regenerating the skin, the method comprising administering piperonylic acid to an individual.
 35. The method of claim 34, wherein the piperonylic acid alleviates or treats skin wounds.
 36. The method of claim 34, wherein the piperonylic acid alleviates or treats burn wounds.
 37. The method of claim 34, wherein the piperonylic acid promotes the proliferation or growth of cells by binding to an epidermal growth factor receptor (EGFR).
 38. The composition of claim 37, wherein the cells are keratinocytes.
 39. The method of claim 34, wherein the piperonylic acid enhances resistance to cell damage due to external stimuli.
 40. The method of claim 39, wherein the external stimuli is ultraviolet rays.
 41. The method of claim 34, wherein the piperonylic acid enhances skin elasticity.
 42. The method of claim 34, wherein the piperonylic acid alleviates skin wrinkles. 